Activity monitoring device



FIG. 1 is a perspective view of a embodiment;

FIG. 2 is a top view of the embodiment;

FIG. 3 is a bottom view of the embodiment; and,

FIG. 4 is a side view of the embodiment.

The broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while all other broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design. 

CLAIM The ornamental design for an activity monitoring device, as shown and described. 